US3964751A - Phonograph cartridge replaceable stylus assembly - Google Patents

Phonograph cartridge replaceable stylus assembly Download PDF

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Publication number
US3964751A
US3964751A US05/600,815 US60081575A US3964751A US 3964751 A US3964751 A US 3964751A US 60081575 A US60081575 A US 60081575A US 3964751 A US3964751 A US 3964751A
Authority
US
United States
Prior art keywords
tube
arm
stylus
damper
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/600,815
Other languages
English (en)
Inventor
Paul Vitale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pickering and Co Inc
Original Assignee
Pickering and Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pickering and Co Inc filed Critical Pickering and Co Inc
Priority to US05/600,815 priority Critical patent/US3964751A/en
Application granted granted Critical
Publication of US3964751A publication Critical patent/US3964751A/en
Priority to CH881276A priority patent/CH599739A5/xx
Priority to DE2632599A priority patent/DE2632599C2/de
Priority to NL7608051A priority patent/NL7608051A/xx
Priority to GB31401/76A priority patent/GB1520337A/en
Priority to CA258,168A priority patent/CA1052704A/en
Priority to FR7623477A priority patent/FR2319952A1/fr
Priority to DK345876A priority patent/DK149293C/da
Priority to IT25852/76A priority patent/IT1067444B/it
Priority to MX165731A priority patent/MX144415A/es
Priority to JP51090385A priority patent/JPS5942361B2/ja
Priority to BE169471A priority patent/BE844779A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/16—Mounting or connecting stylus to transducer with or without damping means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/10—Arranging, supporting, or driving of heads or of transducers relatively to record carriers

Definitions

  • the present invention relates to phonograph cartridges and more particularly to a replaceable stylus assembly for use in phonograph cartridges.
  • Phonograph pickup cartridges are generally either of the magnetic or ceramic type. Magnetic cartridges have recognized advantages in fidelity and response characteristics over ceramic cartridges and are widely used in quality high fidelity and stereophonic equipment.
  • a jeweled stylus is used to track the grooves of a record disc.
  • the stylus has attached to it a magnetic member which moves with the stylus within a magnetic circuit.
  • the circuit includes portions about which a voltage generating coil is mounted so that flux variations in the circuit resulting from movement of the magnetic member are reflected in voltage changes at the output of the coils.
  • magnetic cartridges have been classified as being of either the moving magnet or moving iron type.
  • a permanent magnet moves directly with the jeweled stylus.
  • the latter construction is typified by U.S. Pat. No. 3,546,399 wherein a tubular armature of permeable material moves with the stylus.
  • the armature is magnetically coupled to a fixed permanent magnet which thus serves as the flux source to the magnetic circuit through the armature.
  • the magnetic member i.e., permanent magnet in the first type of cartridge or permeable armature in the latter cartridge
  • the principal object of the present invention to provide an improved stylus assembly wherein the magnetic member is supported in such a manner as to provide low mechanical impedance so that the magnetic member freely moves in accurate correspondence to the motion of the stylus and thereby provides true and accurate response to variations in the record groove.
  • an improved phonograph cartridge stylus assembly comprising a housing having a nonmagnetic tube affixed thereto.
  • the tube has a forward end and a rear end extending outwardly away from the housing.
  • a nonmagnetic stylus arm extends through the tube forward end.
  • a jeweled stylus is mounted to the front of the arm.
  • the rear end of the arm passes through an elastomeric damper positioned within the tube.
  • the damper serves as a universal pivot joint for the arm.
  • the damper comprises a cylindrical member having a forward edge and a rear edge with one of the edges engaging the tube and the other edge being free of the tube.
  • a magnetic member is positioned within the tube secured to the arm and adapted to move therewith in response to motion of the jeweled stylus and following the grooves of a record.
  • FIG. 1 is a perspective view of a magnetic phonograph cartridge
  • FIG. 2 is an enlarged, fragmentary side elevational sectional view of the cartridge stylus assembly.
  • Cartridge 10 comprises a cartridge body 12 and a removable replaceable moving system in the form of stylus assembly 14.
  • Cartridge body 12 contains therein a transducer system which responds electrically and magnetically to the motion of the stylus assembly magnetic member to produce a monophonic, stereophonic or quadraphonic output.
  • the details of the transducer system are immaterial for purposes of the present invention. Suffice it to say, the circuit may be of the type typified in either of the previously referred to U.S. Pat. Nos. 3,297,831 and 3,546,399 or a comparable circuit.
  • the forward face 16 of the cartridge body contains an opening 18 therein adapted to receive a tube 20 of the moving system.
  • stylus assembly housing 22 is provided with flanges to engage the side of the cartrdige body and thereby insure the proper alignment of the stylus assembly with the components contained within the cartridge.
  • tube 20 is secured to the stylus assembly housing 22 and extends outwardly therefrom.
  • Tube 20 is formed of a nonmagnetic material, such as brass, and serves to contain therein a magnetic member which oscillates within the magnetic circuits of the cartridge in response to variations in the groove of a record disc.
  • the stylus assembly includes a jeweled stylus 24 designed to ride in and track the record groove.
  • Jewel 24 is mounted to the forward arm of a nonmagnetic stylus arm 26 which extends from the jewel into tube 20 as shown.
  • the rear end 28 of the stylus arm is supported within an elastomeric grommet 30 to permit generally universal movement.
  • the grommet is formed of rubber or the like which yields sufficiently to permit substantially free movement of the arm.
  • grommet 30 provides a mechanical damper for the stylus arm. It is desirable that the mechanical impedance of the damper be as low as possible so that the magnetic member 32 which is mounted to arm 26 and moves therewith will accurately follow the movement of the stylus.
  • magnetic member 32 comprised a samarium cobalt permanent magnet.
  • the low mechanical impedance of grommet 30 is attained by having the damper engage tube 20 only along a single peripheral edge. The remainder of the damper is free of the tube and thus permitted to move.
  • tube 20 includes a forward section 34, a rear section 36 and a tapered intermediate section 38.
  • Grommet 30 is positioned within the intermediate section. Since the taper of section 30 extends rearwardly, when the rear edge 40 of grommet 30 engages the tube, the forward edge 42 of the grommet is free.
  • a tie wire 44 extends rearwardly and upwardly from the back of stylus arm 26.
  • the end of the wire passes through a slit 46 in the rear of the tube and is soldered in place.
  • the forward end of the stylus arm containing the stylus jewel 24 is directed downwardly to better engage a record disc.
  • magnetic member 32 is a permanent magnet
  • the present construction would apply equally to a moving iron stylus.
  • the magnetic member would be formed of a permeable material and a suitable permanent magnet would have to be provided to magnetize the magnetic member.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Moving Of Heads (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Magnetic Heads (AREA)
US05/600,815 1975-07-31 1975-07-31 Phonograph cartridge replaceable stylus assembly Expired - Lifetime US3964751A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US05/600,815 US3964751A (en) 1975-07-31 1975-07-31 Phonograph cartridge replaceable stylus assembly
CH881276A CH599739A5 (xx) 1975-07-31 1976-07-09
DE2632599A DE2632599C2 (de) 1975-07-31 1976-07-20 Abtastsystem für Tonabnehmer
NL7608051A NL7608051A (nl) 1975-07-31 1976-07-21 Naalddragersamenstel voor een toonopnemer- element van een grammofoon.
GB31401/76A GB1520337A (en) 1975-07-31 1976-07-28 Phonograph cartridges
BE169471A BE844779A (fr) 1975-07-31 1976-07-30 Porte-aiguille de lecture remplacable pour cellule phonocaptrice
CA258,168A CA1052704A (en) 1975-07-31 1976-07-30 Phonograph cartridge replaceable stylus assembly
FR7623477A FR2319952A1 (fr) 1975-07-31 1976-07-30 Ensemble porte-aiguille remplacable pour tete de lecture de disques
DK345876A DK149293C (da) 1975-07-31 1976-07-30 Naalsystem til en grammofonpick-up
IT25852/76A IT1067444B (it) 1975-07-31 1976-07-30 Complesso a stilo intercamiabile a cartuccia per fonografo
MX165731A MX144415A (es) 1975-07-31 1976-07-30 Mejoras a conjunto de aguja para fonografo
JP51090385A JPS5942361B2 (ja) 1975-07-31 1976-07-30 蓄音機カ−トリツジの交換可能な針組立体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/600,815 US3964751A (en) 1975-07-31 1975-07-31 Phonograph cartridge replaceable stylus assembly

Publications (1)

Publication Number Publication Date
US3964751A true US3964751A (en) 1976-06-22

Family

ID=24405152

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/600,815 Expired - Lifetime US3964751A (en) 1975-07-31 1975-07-31 Phonograph cartridge replaceable stylus assembly

Country Status (12)

Country Link
US (1) US3964751A (xx)
JP (1) JPS5942361B2 (xx)
BE (1) BE844779A (xx)
CA (1) CA1052704A (xx)
CH (1) CH599739A5 (xx)
DE (1) DE2632599C2 (xx)
DK (1) DK149293C (xx)
FR (1) FR2319952A1 (xx)
GB (1) GB1520337A (xx)
IT (1) IT1067444B (xx)
MX (1) MX144415A (xx)
NL (1) NL7608051A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319952A1 (fr) * 1975-07-31 1977-02-25 Pickering & Co Inc Ensemble porte-aiguille remplacable pour tete de lecture de disques
US4140321A (en) * 1978-04-04 1979-02-20 Pickering & Company, Inc. Phonograph cartridge replaceable stylus assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5487504A (en) * 1977-12-23 1979-07-12 Alps Electric Co Ltd Electromagnetic pickup cartridge
FR2498869A1 (fr) * 1981-01-23 1982-07-30 Zafira France Cellule de lecture, a aiguille montee sur coiffe remplacable

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060281A (en) * 1960-04-01 1962-10-23 Fairchild Recording Equipment Phonograph pickup cartridge
US3136554A (en) * 1959-07-01 1964-06-09 Ronette Piezo Electrische Ind Stereophonic pick-up
US3146319A (en) * 1960-08-24 1964-08-25 Pickering & Co Inc Magnetic phonograph pickup with compensating pole piece arrangement
US3215785A (en) * 1958-12-23 1965-11-02 Astatic Corp Stereophonic piezoelectric pickup cartridge
US3356795A (en) * 1964-11-05 1967-12-05 Dyna Empire Inc Stereophonic magnetic phonograph pickup cartridge
US3760125A (en) * 1971-03-29 1973-09-18 Dual Gebrueder Steidinger Magnetic pick up with fluxbridge and replaceable stylus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1949271B1 (de) * 1969-09-30 1970-11-19 Electroacustik Gmbh Nadeleinschub fuer magnetischen Tonabnehmer
FR2185565A1 (xx) * 1972-05-24 1974-01-04 Bobst Fils Sa J
DE2364767A1 (de) * 1972-12-28 1974-07-11 Micro Labo Co Elektromagnetischer tonabnehmereinsatz
CH567856A5 (xx) * 1973-05-29 1975-10-15 Huber & Co
DE2365031A1 (de) * 1973-12-28 1975-07-03 Dual Gebrueder Steidinger Magnetischer stereotonabnehmer
DE2365030A1 (de) * 1973-12-28 1975-07-03 Dual Gebrueder Steidinger Elektromagnetischer stereotonabnehmer
US3964751A (en) * 1975-07-31 1976-06-22 Pickering & Company, Inc. Phonograph cartridge replaceable stylus assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215785A (en) * 1958-12-23 1965-11-02 Astatic Corp Stereophonic piezoelectric pickup cartridge
US3136554A (en) * 1959-07-01 1964-06-09 Ronette Piezo Electrische Ind Stereophonic pick-up
US3060281A (en) * 1960-04-01 1962-10-23 Fairchild Recording Equipment Phonograph pickup cartridge
US3146319A (en) * 1960-08-24 1964-08-25 Pickering & Co Inc Magnetic phonograph pickup with compensating pole piece arrangement
US3356795A (en) * 1964-11-05 1967-12-05 Dyna Empire Inc Stereophonic magnetic phonograph pickup cartridge
US3760125A (en) * 1971-03-29 1973-09-18 Dual Gebrueder Steidinger Magnetic pick up with fluxbridge and replaceable stylus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319952A1 (fr) * 1975-07-31 1977-02-25 Pickering & Co Inc Ensemble porte-aiguille remplacable pour tete de lecture de disques
US4140321A (en) * 1978-04-04 1979-02-20 Pickering & Company, Inc. Phonograph cartridge replaceable stylus assembly
JPS54131901A (en) * 1978-04-04 1979-10-13 Pickering & Co Inc Interchangeable stylus assembly for player cartridge

Also Published As

Publication number Publication date
DE2632599A1 (de) 1977-02-17
NL7608051A (nl) 1977-02-02
FR2319952B1 (xx) 1983-02-25
DK345876A (da) 1977-02-01
BE844779A (fr) 1976-11-16
IT1067444B (it) 1985-03-16
DK149293B (da) 1986-04-21
JPS5942361B2 (ja) 1984-10-15
DE2632599C2 (de) 1985-12-12
MX144415A (es) 1981-10-13
CA1052704A (en) 1979-04-17
CH599739A5 (xx) 1978-05-31
DK149293C (da) 1986-11-03
JPS5245301A (en) 1977-04-09
FR2319952A1 (fr) 1977-02-25
GB1520337A (en) 1978-08-09

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